[Fix #311] zsh/presto gets "modified" after clean install
adding brew update
follow presentation style
Merge pull request #359 from victormours/adding-brew-update

Adding brew update to Rakefile
Merge pull request #357 from nandalopes/fix-311-dirty-worktree

[Fix #311] zsh/presto gets "modified" after clean install
Merge branch 'master' of https://github.com/skwp/dotfiles into magus

* 'master' of https://github.com/skwp/dotfiles:
  follow presentation style
  adding brew update
  [Fix #311] zsh/presto gets "modified" after clean install